Plus, OMI jumps into the top 10 with his debut reggae/pop hit "Cheerleader."

Give me an H … O … T … (you get the idea …) Just like every Wednesday, let's run down the top 10 and more on the sales/airplay/streaming-based Hot 100 (dated June 27).

"Again," released on Atlantic Records and promoted to radio by Roadrunner Promotions, maintains its No. 1 rank on the Hot 100 by tallying a fourth week atop the Radio Songs chart with 171 million in all-format audience (up less than 1 percent), according to Nielsen Music. It holds at No. 2 on Streaming Songs (18.3 million U.S. streams, down 5 percent) after eight weeks on top and stays at No. 2 on Digital Songs (139,000 downloads sold, down 12 percent, in the week ending June 14), which it led for seven weeks.

As it extends its run atop the Hot 100, "Again" is one of just nine rap hits (defined as titles which have appeared on Hot Rap Songs) that have led the Hot 100 for nine weeks or more. Here's an updated look at the rap No. 1s that have ruled the Hot 100 the longest:

"Again" keeps its lock on the Hot 100's top spot, but with a smaller margin of victory than last week over Swift's "Blood," as the former decreases by 5 percent in overall activity and the latter gains by 2 percent. "Blood" leads Digital Songs for a fourth week (206,000, down 3 percent); lifts 5-4 on Radio Songs (128 million, up 22 percent), winning the Hot 100's top Airplay Gainer award for a fourth week; and dips 4-5 on Streaming Songs (10.8 million, down 5 percent).

Walk the Moon's "Shut Up and Dance" holds at its No. 4 Hot 100 peak. It leads Hot Rock Songs for a 12th week and the Adult Pop Songs radio airplay chart for a sixth week. On Radio Songs, it pushes 3-2 (149 million, up 3 percent).

OMI notches the week's lone new Hot 100 top 10, as "Cheerleader" climbs 11-7. The reggae-splashed track jumps 5-3 on Digital Songs (135,000); hits the Streaming Songs top 10 (14-10; 8.2 million); and darts 23-18 on Radio Songs (54 million), up by 18 percent in each metric.

The breakout hit for the Jamaican artist (full name: Omar Samuel Pasley) has found global success thanks in large part to its remix by Felix Jaehn. Among its reigns, it led the Official UK Singles chart for four weeks. It also spends a 12th week atop the Reggae Digital Songs chart and has sold 641,000 downloads to-date (with more than half of its release-to-date total scanned in just the last three weeks).

"Cheerleader" joins the elite club of reggae hits that have crossed over to the Hot 100's top 10 over the years. Here are 10 other sunny reggae smashes of note:

("Cheerleader" also adds to great cheerleading moments in Hot 100 history, from Toni Basil's "Mickey" in 1982 to Swift's four-week No. 1 "Shake It Off" last year.)

And, as previously noted, OMI (pronounced "OH-mee") is not to be confused with OMD, which reached No. 4 in 1986 with its Pretty in Pink soundtrack hit "If You Leave." Or … OMC, which hit No. 4 on Radio Songs in 1997 with "How Bizarre." (Or … Usher's "OMG," featuring will.i.am, which led for four weeks in 2010.)

Wrapping the Hot 100's top 10 this week, The Weeknd's "Earned It (Fifty Shades of Grey)" descends 7-8, after peaking at No. 3; David Guetta's "Hey Mama," featuring Nicki Minaj, Bebe Rexha and Afrojack, slips to No. 9 from at its No. 8 peak (while leading Hot Dance/Electronic Songs for an ninth week and passing 1 million downloads sold to date); and, Andy Grammer retreats to No. 10 from No. 9 a week after scoring his first Hot 100 top 10 with "Honey, I'm Good." A nice consolation: the track reaches the Radio Songs top 10 (13-9; 81 million, up 12 percent).

Visit Billboard.com tomorrow (June 18), when all rankings, including the Hot 100 in its entirety and Digital Songs, Radio Songs and Streaming Songs, will refresh, as they do each Thursday. The Hot 100 will also appear in the next issue of Billboard magazine, on sale on Friday (June 19).